KT is a battle pet, of the undead family, and is strong against humanoids and mechanicals. He has various abilities including a Death and Decay, and a Drain Life-esque heal called Siphon Life. He is, alas, weak against aquatic pets. You could put him in a team with Mr. Bigglesworth, that might cheer him up!
He also automatically takes out critters when he's near to them, so if your guild doesn't have Critter Kill Squad yet, KT is a valuable asset. Even if his demonic cackling can grow a little tiresome, he's a great deal for only €5.
Mists of Pandaria is here! The level cap has been raised to 90, many players have returned to Azeroth, and pet battles are taking the world by storm. Keep an eye out for all of the latest news, and check out our comprehensive guide to Mists of Pandaria for everything you'll ever need to know.